Air-presser.



PATENTED NOV. 21, 1905. A. H. GIBSON.

AIR PRESSER.

APPLICATION FILED MAY 2'7, 1905.

UNITED STATES PATENT OFFICE.

ARTHUR II. GIBSON, OF EASTON, PENNSYLVANIA, ASSIGNOR TO THE INGERSOLL-SERGEANT DRILL COMPANY, OF NEW YORK, Y., A CORPORATION OF 'EST VIRGlNIA.

AIR-PRESSEFI.

Specification of Letters Patent.

Annlicntiou led May 27, 1905.

Patented Nov. 21, 19U.

Serial No. 262.628.

To all wil/0771, it muy cm1/cern,.-

Be it known that I, ARTHUR H. GInsoN, a subject of theKing ot' Great Britain, and a resident of Easton, in the county of Kort-hampton and State of Pennsylvania. have invented a new and useful Improvement in Air-Pressers, of which thefollowing is a specification.

The object of this invention is to provide certain improvements in the construction, form, and arrangement of the several parts of an air-presser for use in connection with rock-drills and the like in which the tool-piston is moved back and forth by reciprocating columns of air, the present invention being devoted to means for raising the air-pressure uponV both sides of the presser-piston in a very simple and effective manner.

The accompanying drawing represents in longitudinal central section such parts of a rock-drill and air-presser as will give a complete understanding of this invention.

The tool-cylinder, which is herein represented as a rock-drill cylinder, is denoted by 1 and its piston by 2.

The chamber 3 of the tool-cylinder 1 is provided at the ends of the cylinder with ports 4 and 5, which are in communication with the corresponding ends of two flexible tubes 6 and 7. The other ends of these tubes 6 and 7 communicate with ports 8 and 9, leading to the presser-cylinder chamber 10 in the cylinder 11.

The port 8 is spaced a short distance from the outer end of the presser-cylinder chamber 10, so that the said port is closed by the hollow piston 12 as it nears the limit of its out- Ward movement. This hollow piston 12 is provided with a hollow trunk 13, which is fitted to slide in the inner cylinder-head 14, which is in the 4present instance developed to form a crank-shaft casing 15.

The crank-shaft is denoted by 16, to which is attached the inner end of the pitman-rod 17, the outer end of which rod is connected to the piston 12 within the hollow trunk 13. This crank-shaft 16 may be driven from any well-known or approved motor. (Not shown herein.)

The casing 15 is open to the atmosphere through an aperture 18, and the interior of the hollow piston 12 is open to the interior of the crank-shaft casing 15 through the hollow trunk 13.

A port 19 is located in the outer cylinderv head 20, and a port 21 is located in the wall of the cylinder 11 about midway of its ends. A passage 22, formed by suitable pipe connections, connects the ports 19 and 21. The port 21 is so located that it will be alternately opened to the outer and inner sides of the piston 12 as the piston is reciprocated by the crank-shaft 16.

A one-way valve 23 is located in the passage 22, in the present instance adjacent to the port 19, which valve is arranged to be opened by outward pressure through the port 19. A light spring 24 is employed for normally holding the valve 23 closed.

A leaf-valve 25 is secured to the outer side of the hollow piston 12, in the present in stance by a screw 26, so as to normally close communication from the interior of the piston 12 to the chamber 10.

ln operation, supposing the parts to be in the position in which they are represented in the drawing, as the hollow piston 12 is moved inwardly by the rotation of the crank-shaft 16 a partial vacuum is formed between the outer side of the valve and the outer cylinderhead, thus causing an inrush of air past the leaf-valve 25 from the atmosphere through the crank-shaft casing 15 and hollow pistontrunk 13. This leaf-valve will close the moment the piston 12 uncovers the port 8, thus opening communication from the front side of the tool-piston 2 to the front side of the presser-piston. The continued inward movement of the piston will move the column of air through the tube 7 in a direction to force the tool-piston 2 forwardly. As the piston 12 reaches the limit of its inward movement it will open the port 21 to the front side of the piston, thus permitting an equalization of pressure therein. As the presser-piston 12 is started on its outward movement it will move the column of air in the tube 6 in a direction to cause the tool-piston 2 to move rearwardly. As soon as the piston 12 covers the port 8 the further movement of the piston to the end of its outward stroke will force .the air in the outer end of the cylinder past the valve 23, through the passage 22 and port 21, into the chamber 10 on the inner side of the said piston. It will thus be seen that the smallquantity of air which is drawn into the presser-cylinder at the first part of the 1n- IOO Corrections in Letters Patent No. 805,197.

Ward movement of the piston through the leaf-valve 25 from the outside atmosphere tends to maintain the air in the cylinders at the desired point above atmospheric pressure to produce the best results.

What I claim is- 1. In combination, atool-cyl'inder, a pressercylinder, their pistons and connecting-tubes, a port located in position to be alternately opened to the opposite sides of Vthe presserpiston, a port in the end oi' the presser-cylin der, a passage connecting the ports and a one- Wa;7 valve in the said passage.

2. In combination, atool-cylinder, apressercylinder, their pistons and connecting-tubes, a valve in the presser-piston arranged to admit air from the interior of the presser-piston to the interior of the presser-cylinder chamber, when the piston is moved in one direction, a port locatedin position to be alter nately opened to the opposite sides of the presser-piston, a port in the end of the pressercylinder, a passage connecting the ports and a one-Way valve 1n the sald passage.

3. In combination, a tool-cylinder, a pressercylinder, their pistons and connecting-tubes. the presser-cylinder port for one of the tubes being located a short distance from the end of the cylinder-chamber, a valve in the presserpiston arranged to permit the passage of air from the atmospherethrough the interior of the piston into the chamber When the piston moves in one direction, a passage leading from a point in the chamber intermediate its ends to the end of the chamber and a one-Wa)7 valve in said passage.

In testimon57 that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 25th day of May,

ARTHUR H. GIBSON. Witnesses:

FREDK. HAYNES, HENRY THIEME.

It is hereby certified that in Letters Patent No. 805,197, granted November 21, 1905,

upon the application of Arthur H. Gibson, of y Easton, Pennsylvania., for an improvement in Air-Pressors, errors appear requiring correction, as follows: In the grant,

title` specification, and claims the word presser wherever it occurs should read presser and the word pressers should read preseors; and that the said Letters Patent of the case in the Patient Oee.

l should be read with these corrections therein that the same may conform to the record Signed and sealed this 5th day of December, A. D., 1905.

[SEAL] F. I. ALLEN,

Commissioner of Patents.

Corrections in Letters Patent No. 805,197.

Ward movement of the piston through the leaf-valve 25 from the outside atmosphere tends to maintain the air in the cylinders at the desired point above atmospheric pressure to produce the best results.

What I claim is- 1. In combination, atool-cyl'inder, a pressercylinder, their pistons and connecting-tubes, a port located in position to be alternately opened to the opposite sides of Vthe presserpiston, a port in the end oi' the presser-cylin der, a passage connecting the ports and a one- Wa;7 valve in the said passage.

2. In combination, atool-cylinder, apressercylinder, their pistons and connecting-tubes, a valve in the presser-piston arranged to admit air from the interior of the presser-piston to the interior of the presser-cylinder chamber, when the piston is moved in one direction, a port locatedin position to be alter nately opened to the opposite sides of the presser-piston, a port in the end of the pressercylinder, a passage connecting the ports and a one-Way valve 1n the sald passage.

3. In combination, a tool-cylinder, a pressercylinder, their pistons and connecting-tubes. the presser-cylinder port for one of the tubes being located a short distance from the end of the cylinder-chamber, a valve in the presserpiston arranged to permit the passage of air from the atmospherethrough the interior of the piston into the chamber When the piston moves in one direction, a passage leading from a point in the chamber intermediate its ends to the end of the chamber and a one-Wa)7 valve in said passage.

In testimon57 that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 25th day of May,

ARTHUR H. GIBSON. Witnesses:

FREDK. HAYNES, HENRY THIEME.

It is hereby certified that in Letters Patent No. 805,197, granted November 21, 1905,

upon the application of Arthur H. Gibson, of y Easton, Pennsylvania., for an improvement in Air-Pressors, errors appear requiring correction, as follows: In the grant,

title` specification, and claims the word presser wherever it occurs should read presser and the word pressers should read preseors; and that the said Letters Patent of the case in the Patient Oee.

l should be read with these corrections therein that the same may conform to the record Signed and sealed this 5th day of December, A. D., 1905.

[SEAL] F. I. ALLEN,

Commissioner of Patents.

Corrections in Letters Patent No. 805.197.

' title, specification, and

upon the application of Arthur H. G1bson, of East/on, Pennsylvania, for an improveerrors appear requiring correction, as follows: In the grant,

wherever it occurs should read and that the said Letters Patent claims the word presser pressor and the word pressem should read prsors;

. should be road wiLh these correo-Lions lheroin rabat the same may conform Lo the moord of the caso in the Patient Olrw Signed and sealed this .3th lay oi Dvcvmbfer, A` D.`r i905.

F. I. ALLEN Commissioner of Patente.

[smo] if @llf 947/1. 

